// Make channel2 have pending operations
        channel2.addPendingOperation(mockMessage);

        when(mockChannelManager.getHealthyChannels()).thenReturn(Arrays.asList(channel1, channel2));

        ChannelInfo selected = loadBalancer.selectChannel(queryInfo);
        // Should prefer less loaded channel for metadata operations
        assertEquals(channel1, selected);
    }

    @Test

import jakarta.annotation.Resource;

/**
 * Service class for managing character mapping operations.
 * <p>
 * This service handles character mapping management including CRUD operations
 * and list retrieval. Character mappings are used for text normalization
 * and character substitution during document processing and search operations.
 * </p>
 */
public class CharMappingService {

    /**

/**
 * Strategy interface for different types of upgrade operations.
 * Each strategy handles a specific aspect of the Maven upgrade process.
 *
 * <p>Strategies work with domtrip Documents for perfect formatting preservation.
 * Individual strategies can create domtrip Editors from Documents as needed:
 * <pre>
 * Editor editor = new Editor(document);
 * // ... perform domtrip operations ...
 * // Document is automatically updated
 * </pre>

import jcifs.smb1.dcerpc.DcerpcHandle;
import jcifs.smb1.dcerpc.rpc;
import jcifs.smb1.smb1.SmbException;

/**
 * Handle for Security Account Manager (SAM) alias operations.
 * This class represents an open handle to a SAM alias and provides
 * operations for managing alias membership and properties.
 */
public class SamrAliasHandle extends rpc.policy_handle {

    DcerpcHandle handle;

    /**

                        if (index % 2 == 0) {
                            // Even threads do read operations
                            SMBUtil.writeInt2(4, buffer, 0);
                            response.readBytesWireFormat(buffer, 0);
                        } else {
                            // Odd threads do write operations
                            response.writeBytesWireFormat(buffer, 0);
                        }

/**
 * Helper class for indexing operations in the Fess search engine.
 * This class provides functionality for sending documents to the search engine,
 * managing document lifecycle operations (create, update, delete), and handling
 * thumbnail processing during indexing.
 *
 * <p>The IndexingHelper manages bulk operations, handles retries on failures,
 * and provides various query-based operations for document management.

    /** Thread-safe queue for collecting error messages during crawling operations. */
    private static Queue<String> errors = new ConcurrentLinkedQueue<>();

    /** Injected search engine client for OpenSearch operations. */
    @Resource
    protected SearchEngineClient searchEngineClient;

    /** Injected helper for web and file system indexing operations. */
    @Resource
    protected WebFsIndexHelper webFsIndexHelper;

import org.lastaflute.web.response.ActionResponse;

/**
 * Manager class for coordinating SSO (Single Sign-On) authentication operations.
 *
 * This class serves as the central coordinator for SSO authentication in Fess.
 * It manages registered SSO authenticators, determines when SSO is available,
 * and delegates authentication operations to the appropriate SSO provider based
 * on the current configuration.
 */
public class SsoManager {

import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.internal.util.SMBUtil;

/**
 * SMB1 Seek command response implementation.
 * Handles server responses to file seek operations, returning the new file
 * position after a seek request in SMB1 protocol file operations.
 *
 * @author mbechler
 */
public class SmbComSeekResponse extends ServerMessageBlock {

    private long offset;

    /**
     * Constructs a seek response.

    implements Multiset<E> {
  // Query Operations

  @Override
  public boolean isEmpty() {
    return entrySet().isEmpty();
  }

  @Override
  public boolean contains(@Nullable Object element) {
    return count(element) > 0;
  }

  // Modification Operations
  @CanIgnoreReturnValue
  @Override
  public final boolean add(@ParametricNullness E element) {